Popdown menus, also known as dropdown menus or drop-down lists, are common features of websites and applications that allow users to select from a list of options. Other synonyms for popdown menus include cascading menus, pull-down menus, flyout menus, contextual menus, and menu bars. These menus can be static or dynamic, meaning that the options can change depending on user input or context. Users can typically access popdown menus by clicking on a button or arrow, or by hovering over a specific area. Popdown menus are easy to use and can save time for users by providing a quick and organized way to select from a list of options.